10 St Mary's Place, London, W8 5UE Data via plota.co.uk

PP/25/06656 - Planning Permission Approved
Extensions & alterations

Proposal

Construction of single-storey side infill extension at rear. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
11 Nov 2025
✓
Approved
27 Jul 2026

Approved on 27 Jul 2026 · Last checked 22 Oct 2026

Documents

View the documents on the council's website ↗

Site constraints 9

Article 4 direction
Article 4 - No 100. Named permitted development rights are withdrawn here.
An Article 4 direction withdraws particular permitted development rights, so work that would normally need no application needs one here. Not every council has published its directions.
Air quality management area: Kensington and Chelsea AQMA
The council has declared the area as failing an air quality objective.
Schemes that add traffic, parking or combustion plant are assessed against the area's action plan and may need an air quality assessment.
Council record ↗
5 listed buildings within 150 m
Nearest: Stonehall Outpatients Clinic, St Mary Abbot's Hospital, Grade II, 58 m away · 4 Grade II
The site itself is not listed. Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Show all 5 with distances
Historic England ↗
Conservation area 23 m away: De Vere
The edge of the area; work outside it can still affect its setting.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Council document ↗
Also on the record
National infrastructure project 1744 m away: Thames Tideway Tunnel; Inside the Kensington and Chelsea built-up area; Public transport access: PTAL 5 (very good), TfL 2023, for the 100 m square; Designated open space 3 m away; Tree preservation order 23 m away.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 3 November 2026. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

Sales history 2

Last sold for £9,000,000 in April 2022. Terraced house, freehold.

29 April 2022£9,000,000
17 February 1997£1,625,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area287 m² (3,089 sq ft)
Energy ratingC (73 out of 100)
PropertyEnd-terrace house, 7 habitable rooms
Built1996 to 2002
HeatingBoiler and radiators, mains gas
WallsCavity wall, as built, insulated (assumed)

From the energy performance certificate lodged in September 2015, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

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Important details

Council
Kensington and Chelsea
Application type
Planning Permission
Postcode
W8 5UE
Received
11 Nov 2025
Validated
11 Nov 2025
Ward
Abingdon
Case officer
Show
Target decision
6 Jan 2026
Decision
Granted
Decision date
27 Jul 2026
Applicant
Show

How this decision compares

Decided in 258 days from validation, 180 days slower than Kensington and Chelsea's median of 78 for extensions. Approved, as 95% of extensions here are.

35%decided within 8 weeks
95%approved
1,595decided in the last year

Plota live figures for extensions decided by Kensington and Chelsea in the last twelve months, from validation. Kensington and Chelsea decision record →

Consultation & key dates

Comments by
3 Apr 2026

Historical activity at this location

27 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2024 Approved
Details required by condition 5 (Sustainable Urban Drainage) of planning permission 23/07…
CON/24/02389
2023 Approved
Erection of single-storey side infill extension.
PP/23/07173
Within ~100m

Nearby activity

2025 Approved
8 Cornwall Mews West, London, SW7 4BH
Construction of second floor roof addition
PP/25/05733
2025 Approved
Albert House, 27 Kelso Place, London, W8 5QG
Variation of condition 2 (approved drawings) of planning permission PP/24/00172 (Replacem…
PP/25/04817
2025 Approved
10 and 11 St Mary's Place, London, W8 5UE
Erection of a new external metal staircase, new metal railings and new first floor timber…
PP/25/04399
2025
38 Kelso Place, London, W8 5QP
Excavation of an additional storey beneath footprint of property, with windows inserted i…
PP/25/05420
2025 Approved
1 Kelso Place, London, W8 5QD
Demolition of rear garden outbuilding and formation of outdoor garden space with seating…
PP/25/03421
2025 Approved
10 and 11 St Mary's Place, London, W8 5UE
Partial replacement of existing masonry boundary wall with metal boundary wall
PP/25/00108
2024 Approved
19 Kelso Place, London, W8 5QG
Infill ground floor rear extension; addition of side windows at ground floor level; remov…
PP/24/07616
2024 Approved
19 Kelso Place, London, W8 5QG
Enlargement of first floor rear window to create a floor to ceiling window
PP/24/07620
2024 Withdrawn
10-11 St Mary's Place, LONDON, W8 5UE
Erection of external metal staircase, metal railings and first floor timber French doors…
PP/25/00090
2024 Withdrawn
38 Kelso Place, LONDON, W8 5QP
Excavation and construction of a lower ground floor, below ground floor, with windows ins…
PP/24/06447
2024 Approved
18 Kelso Place, LONDON, W8 5QD
Proposed rear extension to second floor of existing rear closet wing.
PP/24/03778
2024 Approved
10-11 St Mary's Place, LONDON, W8 5UE
Installation of two A.C outdoor condensing units in the rear gardens of Nos. 10 and 11 St…
PP/24/02320
2024 Withdrawn
18 Kelso Place, LONDON, W8 5QD
Proposed rear extension to second floor of existing rear closet wing.
PP/24/00370
2024 Approved
Albert House, 27 Kelso Place, LONDON, W8 5QG
Replacement infill extension and facade improvements, roof extension and conservation sty…
PP/24/00172
2023 Approved
Flat 25, Cornwall Gardens Court, 47-50 Cornwall Gardens, LONDON, SW7 4AD
Upgrading of heating system, lighting and finishes; repair and refurbishment including ch…
PP/23/08001
2023 Approved
38 Kelso Place, LONDON, W8 5QP
Prune 1 x Silver maple (rear)
ARB/23/08290
2022 Approved
1 Kelso Place, London, W8 5QD
Construction of basement beneath the footprint of the building with light well to front a…
PP/22/06710
2023 Approved
10 and 11 St Mary's Place, LONDON, W8 5UE
Construction of 2.6m deep rear lower ground floor extensions at Nos 10 and 11; insertion…
PP/23/07120
2023 Approved
2 Kelso Place, LONDON, W8 5QD
Prune 1 x Birch in rear garden.
ARB/23/07950
2023 Approved
18 Kelso Place, London, W8 5QD
Construction of a two storey side infill extension to end of terrace dwelling house
PP/23/04373
2016 Refused
32 Stanford Road, LONDON, W8 5PZ
Construction of dormer window to side elevation.
PP/16/06320
2016 Approved
32 Stanford Road, LONDON, W8 5PZ
Erection of a rear extension at first floor level.
PP/16/04863
2016 Approved
24 Stanford Road, LONDON, W8 5PZ
Prune 1 x Japanese Maple(front)
ARB/16/03794
2016 Approved
54 Stanford Road, LONDON, W8 5PZ
Infilling of gap between closet wing and 6 storey wall of adjacent flat to south. Erectio…
PP/16/00587
2016 Approved
21 Kelso Place, LONDON, W8 5QG
Creation of ground floor rear extension including replacement of top 3 panels of garage d…
PP/16/00769
Kensington and Chelsea
Planning Authority Score
5.1/10
Average
#144 of 296 councils
Relevant to this application:
Householder decisions

Kensington and Chelsea ranks #174 out of 296 councils for householder decision speed. Householder applications are slightly more likely to be approved here (94%) than the national average (90%).

These figures are council-wide context, not a prediction for this application. View full council performance
Kensington and Chelsea decision statistics
Based on MHCLG data, the nine months to December 2025
93%
Overall approval rate
Above avg (87%) #58 of 296
94%
Householder approved
Above avg (90%) #110 of 296
61%
Decided in 8 weeks
Below avg (63%) #174 of 296
40%
Extended time limit
Below avg (41%) #152 of 296
94%
Minor dwellings approved
455 decided (1-9 homes)
87%
Change of use approved
53 decided
1,839
Total decisions
135 refused in the nine months to December 2025
Source: MHCLG planning statistics · See full council rankings

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.